How Redline Malware Led to 5,417,832 Stolen Logins

HEROIC identified an enormous stealer log archive labeled FRESH ULPP 17-06-2026 Redline_Cl0ud4 shared on Telegram in June 2026. Containing 5,417,832 compromised credential records, this is among the largest single Redline stealer log dumps ever tracked by HEROIC. The sheer volume of stolen data means millions of individuals face real and immediate threats to their online security.

5.4 Million Plaintext Passwords in the Wild

Every credential in this collection was captured in plaintext by Redline malware and stored without any form of encryption. At a scale of 5.4 million records, this dump provides attackers with an enormous reservoir of immediately usable login credentials. The plaintext format eliminates any technical barrier to exploitation, meaning every affected account can be targeted the moment someone accesses the file.

What Was Exposed

• Email Addresses — millions of unique accounts spanning personal, corporate, and government domains
• Plaintext Passwords — unprotected credentials captured directly from browsers on millions of infected devices
• URLs — the login pages of banks, email providers, social platforms, and enterprise tools where credentials were harvested

Credential Stuffing at Industrial Scale

With 5.4 million credential pairs, attackers can mount credential stuffing campaigns of unprecedented scale. Automated tools will systematically test these combinations against every major online service. Given that password reuse rates remain stubbornly high, even a conservative 2% success rate would yield over 100,000 additional compromised accounts across financial services, healthcare portals, corporate systems, and consumer platforms.

The Redline Infection Chain

Redline infostealer is among the most prolific credential-stealing malware families in operation. Victims typically become infected by downloading cracked software, clicking malicious advertisements, or opening weaponized email attachments. The malware then systematically extracts every credential stored in all installed browsers, captures session cookies for active logins, collects cryptocurrency wallet keys, and gathers system fingerprint data. This harvested intelligence is uploaded to attacker-controlled servers and eventually surfaces in massive dumps like this one on Telegram.

Check If Your Credentials Were Exposed

Given the massive scale of this dump, the chances of being affected are significant. HEROIC's breach scanner indexes over 400 billion records and can tell you whether your email address or password appeared in this Redline collection or any other known leak. Search now and take immediate action to secure any compromised accounts.